Tank roof



Jan. 3, 192s.

TANK ROOF ATToizNEY L Patented Jan. 3, 1928.

UNITED STATES PATENT OFFICE.

JAY ALBERT STOUGH, 0F TULSA., OKLAHOMA.

TANK Boor.

Application filed October 8, 1925. Serial No. 61,350.

My invention relates to tank roofs and more particularly to a roof for oil storage tanks, the principal object'of the invention being to provide a practically vapor-tight roof whereby liability of ignition lof oil vapors from static sparks will be veliminated or reduced to a minimum.

In accomplishing this object I have provided improved details of structure,

the prea tank provi ed with a roof constructed according to my invention. Referring more in detail to the drawing noted, be of the ordinary by numerals of except as hereinafter type used on tank farms for storing large quantities of crude petroleum, and consisti rights 2 for supportin the roof rafters 4 rest, t sheathing 5 covering side walls 6 being of tion, having an angle 7 the usual metallic construcng of the usual u p- `beams 3 on which e rafters 4 carryingtop of the tank; the

at its upper end.

In my preferred form of -roof the sheathing 5 is preferably covered with a layer of roofing paper 9, which is covered with an adhesive coat which a secon ((preferably sodium silicate) to layer of paper -10 is applied,

and mopped with a coat of fibrous cement. Then a layer of fibrous insulation 11, preferably laid over the last layer -of paper.

about one-half inch in'thickness, is

These layers of paper and sodium silicate tend to make the roof gas-tight tents of the tank through the roof.

The insulationis and insulate theJ confrom heat transmlssion then mopped with a coat of fibrous cementI and the entire roof covered,

preferabl to within a eaves wit or felt roofing 12.

eicient connection short 'distance of its ordinary two or three ply asbestos with the ami and to make an as well as to pro- I provide at the edge of the roof a metallic circular ring 13, comprising a plurality of segments or members 14 arranged cent edges overlapping together by bolts or vices 16.

The outer edge cured to the horizontal in circular series,

the adjaas at 15 and secured other fastening des of the segments are selange 17 of the wall cover, a metallic rin angle 7 by bolts 18, there being a gasket 19 inserted bet-Ween the angle 7 and the edges of the segments to make the joint gas-tight, the inner edges of the segments overlapping the edge 2() of the roofing 12 and secured in place by lag screws 2l which extend through openings in the edge of the plates and through the roofing, into the sheathing boards. The inner edges of the segments are sealed by flexible cement 22 which extends between the overlapping edges of the segments on the roofing and is spread on an incline from the surface of the roofing flush with the surface of the segments.

The iittings for the tank, such as the gauge hole cover 23, flanged pipe couplings 2fl and the like, are secured to the metallic ring intheir proper ositions by bolts 24 or the like which extend) through a flange 25 on the fitting and through the ring segments and are drawn up tight to make a irm contact between the metal surfaces.

, By providing the metallic ring to carry the fittings and make connection between the wall of the tank and the roofing 12, and with the use of the flexible cement as described, liability of seams opening up dueto the expansion and contraction of the tank, will be eliminated and the highly volatile gases in the tank cannot become ignited by static discharge, since the parts are all firmly connected to the metallic ring and the ring securely bolted to the wall of the tank so that an static will necessaril be grounded through the wall of the tank'.

What I claim and desire to secure by Letters-Patent is 1. A tank comprising a side wall and roof sheathing, an angle memberfat the .upper edge of the wall, a cover of insulating material on the sheathing, sheeting on said overlying the angle member at its outer e ge and intermediately engaged with said cover and overlying the sheeting at its inner edge, sealing material between the outer edge of the ring and the angle member and between the inner edge of the ring and said sheeting, and means for securing the ring to the angle member and to the roof sheathing. p

2. A tank comprising a side wall and roof sheathinf, an angle member at the upper edge of the wall, sheeting on the roof sheathing, a metallic ring overlying the an le menber at its outer edge and overlying e ro f sheeting at its inner edge, compressible sealing material between the outer edge material, with the edge of the ring terof the ring and the angle member and beminat-ing flush with the edge of the angle 20 tween the inner edge of the ring and the member. roof sheeting, said sealing material being 4. A tank comprising a side wall and roof extended to cover adjacent ring edge and sheathin an angle memberl at` the upper sheeting portion to provide an exterior edge of t e wall, sheeting on the roof sheathannular seal, and means for securing the ing terminating short of the edge of the 25 f ring tothe-angle member and tothe roof roof, a metallic ring overlying the angle sheathing. member at its outer edge4 and overlying the 3. A tank comprising a side Wall and roof edge of the sheetin at its inner edge, sealing sheathing, an angle member at the `upper material between the outer edge .of the ring edge of the wall, a cover of insulating maand angle member4 and betweeny the inner 30 terial on the rooi:` sheathing, sheeting on said edge of the ring and the sheeting, and means cover terminating short of the edge of the for securing the ring to the angle member roof, a metallic ring overlying the roof and to the roof of the tank, sheeting at its inner edge and overlying the In ltestimony whereof I aiiix my signature. angle'member at its outer edge and intermediately engaged with said insulating JAY ALBERT STOUGH. 

